Low temperature-induced sterility in rice: Evidence for the effects of temperature before panicle initiation

Shimono, Hiroyuki; Okada, Masumi; Kanda, Eiji; Arakawa, Ichiro

doi:10.1016/j.fcr.2006.11.010

Cited by 124 publications

(99 citation statements)

References 25 publications

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“…Low temperatures at the rice vegetative stage increases the growth period (Alvarado and Hernaiz, 2007). On the other hand, cold stress at the reproductive stage produces panicle sterility and lower grain production and yield (Shimono et al, 2007). In all cases, the level of damage associated with cold stress will depend on the development stage and intensity of the cold event (Jacobs and Pearson, 1994).…”

Section: Introductionmentioning

confidence: 99%

Cold tolerance evaluation in Chilean rice genotypes at the germination stage

Ñanculao

Cárcamo

Santos

et al. 2013

Chilean J. Agric. Res.

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Low temperature is the most important abiotic stress affecting rice (Oryza sativa L.) yield in Chile. Rice in Chile is usually planted when the minimum air temperatures are below 12 °C. This temperature is lower than the optimum needed for normal rice germination. Therefore, the aim of this study was to evaluate cold tolerance in 20 experimental lines from the Rice Breeding Program of the Instituto de Investigaciones Agropecuarias (INIA), Chile, at the germination stage. Coleoptile length reduction (CRED), coleoptile length after cold treatment (CLEN), coleoptile length recovery (CREC), and coleoptile regrowth (CREG) were evaluated at 13 °C for 4 d using 'Diamante-INIA' as the cold-tolerant control. To find genotypes with cold tolerance (low CRED value and high CLEN, CREC, and CREG values), genotypes were ranked, a biplot of principal components, and cluster analysis were performed. No differences were found among genotypes in the ranking based on CREC value so this trait was not considered. Analysis showed that only three experimental lines had cold tolerance similar to that of 'Diamante-INIA'; all other experimental lines exhibited intermediate to low cold tolerance. These results showed low cold tolerance of some Chilean genotypes at the germination stage, thus confirming the need to evaluate the rest of the germplasm from the Rice Breeding Program.

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Section: Introductionmentioning

confidence: 99%

Cold tolerance evaluation in Chilean rice genotypes at the germination stage

Ñanculao

Cárcamo

Santos

et al. 2013

Chilean J. Agric. Res.

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“…In some rice fields, water temperature is not uniform due to low temperature of intake irrigation water (Raney et al 1957). The temperature of irrigation water affects rice productivity by regulating photosynthetic and developmental rates (Shimono et al 2004 andShimono et al 2002) and by influencing the susceptibility of the rice plant to spikelet sterility (Shimono et al 2007). The threshold water temperature for yield loss is 20°C (Roel et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Underlying causes of yield spatial variability and potential for precision management in rice systems

et al. 2013

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Our current understanding of the mechanisms driving spatiotemporal yield variability in rice systems is insufficient for effective management at the sub-field scale. The overall objective of this study was to evaluate the potential of precision management for rice production. The spatiotemporal properties of multiyear yield monitor data from four rice fields, representing varying soil types and locations within the primary rice growing region in California, were quantified and characterized. The role of water management, land-leveling, and the spatial distribution of soil properties in driving yield heterogeneity was explored. Mean yield and coefficient of variation at the sampling points within each field ranged from 9.2 to 12.1 Mg ha -1 and from 7.1 to 14.5 %, respectively. Using a k-means clustering and randomization method, temporally stable yield patterns were identified in three of the four fields. Redistribution of dissolved organic carbon, nitrogen, potassium and salts by lateral flood water movement was observed across all fields, but was only related to yield variability via exacerbating areas with high soil salinity. The effects of cold water temperature and land-leveling on yield variability were not observed. Soil electrical conductivity and/or plant available phosphorus were identified as the underlying causes of the within-field yield patterns using classification and regression trees. Our results demonstrate that while the high temporal yield variability in some rice fields does not permit precision management, in other fields exhibiting stable yield patterns with identifiable causes, precision management and modified water management may improve the profitability and resource-use efficiency of rice production systems.

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“…Accuracy (%) was exposed to the large variation in air temperature from day to night, which is typical at Mediterranean climates, such the Chilean (Shimono et al, 2007). The effect of N on PVP was significant only in Experiment 2, with the var.…”

Section: Precision (%) Varietymentioning

confidence: 99%

Implementation and Evaluation of an Image Analysis System for Determining Viability of Pollen Grains in Temperate Rice

2011

Chilean J. Agric. Res.

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Geographical and climatic factors limit the production of temperate rice (Oryza sativa L.) in Chile. Large thermal fluctuations of air and water temperatures affect the viability of pollen, causing high levels of spikelet sterility ("blanking"), resulting in reduced yields per hectare. Counting viable pollen grains, at the time of anthesis, may allow determining, ahead, whether there will be yield losses by spikelet sterility; besides, knowing the potential pollen viability serves as a powerful tool for material selection in breeding programs, and for determining which management factors may influence "blanking". If performed manually, counting total and viable pollen grains can be extremely tedious, producing highly variable results. The present work had for objectives to develop and evaluate a system, based on imagery analysis, for counting total and viable pollen in rice anthers. At the time of anthesis, three panicles were collected from plot treatments of two field experiments in which the effects of different management factors (variety, water height, N rate, and spatial arrangement) on spikelet sterility were evaluated. Two spikelets and four anthers were sampled from each panicle; pollen grains were extracted from anthers and photographed. Manual and digital counts were made on the images to determine total and viable pollen. Digital count was performed with the software SigmaScan Pro, setting some parameters on the imagery before counting. Precision and accuracy of the digital method were estimated. The results indicated that the digital pollen count showed a very good precision and accuracy and could be used to estimate pollen viability, and as a response variable to compare management treatments.

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Low temperature-induced sterility in rice: Evidence for the effects of temperature before panicle initiation

Cited by 124 publications

References 25 publications

Cold tolerance evaluation in Chilean rice genotypes at the germination stage

Cold tolerance evaluation in Chilean rice genotypes at the germination stage

Underlying causes of yield spatial variability and potential for precision management in rice systems

Implementation and Evaluation of an Image Analysis System for Determining Viability of Pollen Grains in Temperate Rice

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